GASTEROPODA. 49 



Tr. Testa elong aid, fusiformi, crassd; anfractibus septem, convexis; suturisprofundis; 

 longitudinaliter costatis, costis 10 — 14 obtusis, transversim striatis ; aperturd ovatd ; labro 

 intus incrassato, lavigato ; canali brevi subrecurvd. 



Shell elongato-f usiform, thick, and strong, with seven convex volutions ; longi- 

 tudinally costated, with 10 — 14 obtuse costas; transversely striated ; aperture ovate; 

 outer lip thickened, without denticulations ; canal short, slightly recurved. 



Axis, 2 inches. 



Locality. Cor. Crag, Gedgrave. 



Red Crag, Walton Naze, Sutton. 



This is a very rare species in the Coralline beds, but abundant in the Red Crag, 

 more especially at Walton, where it is found in good preservation. Var. b has about 

 thirteen costas on the last volution. It has fewer in its young state, and seldom has 

 . them in a continued line. In var. a, the costee do not appear upon the body whorl ; 

 the apex tapers to a fine point, and is smooth. The name costatus being preoccupied, 

 I have proposed the above in the place of it. 



7. Teophon alveolatum. /. Sow. Tab. VI, fig. 8, a — b. 



Fusus alveolatus. J. Sow. Min. Conch, t. 525, 1826. 



— S. Wood. Catalogue 1842. 



— Nyst. Coq. foss. de Belg. pi. 39, fig. 21, 1844. 



Tr. Testa turrita, elongatd, subulatd, fusiformi ; anfractibus convexis, superne suban- 

 gulatis ; longitudinaliter costellatis, alveolatis ; costellis transversis tuberculosis ; aperturd 

 subovatd ; canali breviusculd, subrectd. 



Shell turreted, elongate, fusiform ; volutions convex, with two elevated, trans- 

 verse, tubercular ridges ; upper part of volution subangulated ; longitudinally 

 costellated, decussated, and alveolated ; aperture ovate, with a moderate-sized and 

 nearly straight canal. 



Axis, If inch. 



Locality. Cor. Crag, Gedgrave. 



Red Crag, Sutton and Brightwell. 



This species was, until lately, rare, but numerous specimens have been recently 

 obtained from a newly-opened part of the Coralline Crag at Gedgrave. There are 

 four transverse ridges upon the body of the shell, the upper one of which is the 

 largest, giving a subcarinated form to the volution; the two lower ridges are covered 

 by the succeeding whorl, leaving only two visible upon the spire. The left lip is very 

 thin in all my specimens, and not so distinct as it is represented in the Belgian shell. 



8. Teophon consociale. 8. Wood. Tab. VI, fig. 11, a — b. 



Tr. Testa conico-turriculatd, fusiformi, spird elevald ; anfractibus septem convexis, 

 tumidis, subcarinatis, decussatis, superne planatis ; costis transversis tuberculosis ; aperturd 

 ovatd; columella rccurvd ; canali breviusculd. 



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